A cross-platform G-Code sender for GRBL, Smoothieware, etc.
Speech-to-text, text-to-speech, and speaker recognition
Offline speech recognition API for Android, iOS, Raspberry Pi
PhantomBot is an actively developed open source interactive Twitch bot
The binary distribution of openHAB
Allows you to emulate an Android native library
ROBOTIS Dynamixel SDK (Protocol1.0/2.0)
Portable ZX-Spectrum emulator based on UnrealSpeccy 0.37.3 by SMT
Modbus server designed for Raspberry PI to control GPIO/I2C devices.
A simple MP3 and web radio player for the Raspberry Pi
An open source ambient light for many systems
DBLX3 Relational Database System
A Java VM for ARDUINO and other micros using the leJOS runtime.
A J2ME emulator for Windows, Linux, and Raspberry Pi
This is actually a manipulated uelastix (popular VoIP package based on asterisk) which works with Raspberry Pi 1, 2, and 3
Open Source for Internet of Things
Software para la Medición Automática de la Oscuridad del Cielo
Serial connection Java library
A lightweight Java HTTP server and webservice-framework
Kitchen Screen for Chromis POS, and other open source software
You Only Meter Once - The open hardware smart metering system
Static blog engine written in Java.
Simple and low-consumption Java 2D Game Engine